1. Elements, Compounds and Mixtures
9/15/10
Catalyst
Models
Classification Activity

2. Matter
The atoms and molecules that make up our surroundings. Chemistry is the study of matter We need to be able to describe what it’s made of, how it works and what it looks like!

3. So, where are we?
What we’ve learned… How to classify matter into states: solid, liquid, gases. (the big picture) Where we’re going… Taking a closer look – groups of atoms and molecules

4. What we’re doing today NO!
As scientists, we make decisions based upon what we observe (colors, changes, textures, etc.)
But can we see atoms?
NO!
Today we’ll be using models to examine matter and how it interacts.

5. Do not open the petri dishes!
Part 1: Modeling Atoms
Each group has a set of dishes filled with beads – these are our samples of matter
Each atom is represented by one bead
Each compound (groups of atoms bound together) is represented by a group of beads
Compounds and atoms are both particles. So, single beads and groups of beads are also particles in our model!
Do not open the petri dishes!

6. Part 2: Pure Substance vs. Mixture
Pure substance: all particles of matter are identical Mixture: a physical blend of two or more pure substances in any proportion Your group task: take 4 minutes to sort your petri dishes into two groups: pure substances and mixtures. Write the symbols from the petri dishes onto your worksheet according to how you grouped them.

7. ELEMENTS, COMPOUNDS, & MIXTURES ACTIVITY
SORT DISHES INTO TWO GROUPS, MIXTURES AND PURE SUBSTANCES.
MIXTURE
PURE SUBSTANCE

8. Part 3: Pure substances: Elements vs. Compounds
Pure substances can be classified into two sub-categories: Element: substances made from one type of atom Compound: substances made from one or more types of atoms, chemically bound together Your group task: take 4 minutes to list the pure substances you classified in Part 1, then categorize them into elements and compounds. Once you have sorted them, list the formulas from the petri dishes onto your worksheet in Part 2.

9. ELEMENTS, COMPOUNDS, & MIXTURES ACTIVITY
SORT PURE SUBSTANCE GROUP INTO TWO SUBGROUPS.
NON-MIXTURES – PURE SUBSTANCE
Elements
Compounds

10. Part 4: Elements, Compounds and Mixtures
Group task: Based on the groups you just made, take 5 minutes to fill in the table in Part 3 on your worksheet with drawings of the samples and their formulas. For example, was classified as a compound, so I would draw it in a box in the compound row of the table and write it’s symbol

11. ELEMENTS, COMPOUNDS, & MIXTURES ACTIVITY (Part 3)
NON-MIXTURES – PURE SUBSTANCE
ELEMENT
COMPOUND

12. Part 5: Summary
Reflection: Take a minute to think about something new that you’ve learned today.
Flow chart
Based on the work we’ve done today, create a flow diagram that organizes matter
Must include the words: Matter, elements, pure substances, compounds and mixtures

13. Principals and Vice Principals
Example Flow Chart
School
Principals and Vice Principals
Students
Teachers
Boys
Girls

14. Matter, Elements, Pure Substances,
Matter Flow Chart
Matter, Elements, Pure Substances,
Mixtures, Compounds
MATTER
PURE SUBSTANCE
MIXTURE
ELEMENT
COMPOUND